The white discharge and Itchiness are most likely due to a vaginal infection. In females who are not sexually active, vaginal candidiasis (a fungal infection) is the most common and likely cause of these symptoms. The discharge is cotton wool like in appearance, whitish in color, thick, but no strong foul smell is emitted from it. Itchiness can be very severe to the extent of injuring yourself. Treatment is with oral and topical antifungal.
Anal Itchiness commonly results from worm infestation, hemorrhoids, or warts. To identify the underlying cause, direct examination of the area and possibly specific tests (like in the case of possible worm infestation, the tape test is done) are needed. Treatment will follow accordingly.